#!/bin/bash
#
# lib/kuryr
# Utilities for kuryr-kubernetes devstack
# bind_for_kubelet
#   Description: Creates an OVS internal port so that baremetal kubelet will be
#                able to make both liveness and readiness http/tcp probes.
#   Params:
#      project - Id or name of the project used for kuryr devstack
#      port    - Port to open for K8s API, relevant only for OpenStack infra

# Dependencies:
# (none)

KURYR_CONF_NEUTRON=$(trueorfalse True KURYR_CONFIGURE_NEUTRON_DEFAULTS)
KURYR_IPV6=$(trueorfalse False KURYR_IPV6)
KURYR_DUAL_STACK=$(trueorfalse False KURYR_DUAL_STACK)
KURYR_USE_LC=$(trueorfalse False KURYR_CONTAINERS_USE_LOWER_CONSTRAINTS)


function container_runtime {
    # Ignore error at killing/removing a container doesn't running to avoid
    # unstack is terminated.
    # TODO: Support for CRI-O if it's required.
    local regex_cmds_ignore="(kill|rm)\s+"

    if [[ ${CONTAINER_ENGINE} == 'crio' ]]; then
        sudo podman "$@" || die $LINENO "Error when running podman command"
    else
        if [[ $@ =~ $regex_cmds_ignore ]]; then
            docker "$@"
        else
            docker "$@" || die $LINENO "Error when running docker command"
        fi
    fi
}

function ovs_bind_for_kubelet {
    local port_id
    local port_mac
    local fixed_ips
    local port_ips
    local port_subnets
    local prefix
    local project_id
    local port_number
    local security_group
    local ifname
    local service_subnet_cidr
    local pod_subnet_gw
    local cidrs
    local _sp_id=${KURYR_NEUTRON_DEFAULT_SUBNETPOOL_ID}

    project_id="$1"
    port_number="$2"
    security_group=$(openstack security group list \
        --project "$project_id" -c ID -c Name -f value | \
        awk '{if ($2=="default") print $1}')
    port_id=$(openstack port create \
        --device-owner compute:kuryr \
        --project "$project_id" \
        --security-group "$security_group" \
        --security-group service_pod_access \
        --host "${HOSTNAME}" \
        --network "${KURYR_NEUTRON_DEFAULT_POD_NET}" \
        -f value -c id \
        kubelet-"${HOSTNAME}")

    ifname="kubelet${port_id}"
    ifname="${ifname:0:14}"
    port_mac=$(openstack port show "$port_id" -c mac_address -f value)
    fixed_ips=$(openstack port show "$port_id" -f value -c fixed_ips)
    port_ips=($(python3 -c "print(' '.join([x['ip_address'] for x in ${fixed_ips}]))"))
    port_subnets=($(python3 -c "print(' '.join([x['subnet_id'] for x in ${fixed_ips}]))"))

    sudo ovs-vsctl -- --may-exist add-port $OVS_BRIDGE "$ifname" \
        -- set Interface "$ifname" type=internal \
        -- set Interface "$ifname" external-ids:iface-status=active \
        -- set Interface "$ifname" external-ids:attached-mac="$port_mac" \
        -- set Interface "$ifname" external-ids:iface-id="$port_id"

    sudo ip link set dev "$ifname" address "$port_mac"
    sudo ip link set dev "$ifname" up
    for i in "${!port_ips[@]}"; do
        prefix=$(openstack subnet show "${port_subnets[$i]}" \
            -c cidr -f value | \
            cut -f2 -d/)
        sudo ip addr add "${port_ips[$i]}/${prefix}" dev "$ifname"
    done

    # TODO(dulek): This hack is for compatibility with multinode job, we might
    #              want to do it better one day and actually support dual stack
    #              and NP here.
    if [[ -z ${KURYR_SERVICE_SUBNETS_IDS} ]]; then
        KURYR_SERVICE_SUBNETS_IDS=(${KURYR_NEUTRON_DEFAULT_SERVICE_SUBNET}-IPv4)
        KURYR_POD_SUBNETS_IDS=(${KURYR_NEUTRON_DEFAULT_POD_SUBNET}-IPv4)
    fi

    if [[ -z ${KURYR_SUBNETPOOLS_IDS} ]]; then
        # NOTE(gryf): In case we are missing KURYR_SUBNETPOOLS_IDS variable
        # populated, which probably means, that kuryr-kubernetes service is
        # not enabled, but if kuryr-daemon service is enabled (which is the
        # case for multi node setup, where worker nodes should have it
        # enabled), we need to have it filled.
        export KURYR_SUBNETPOOLS_IDS=()
        export KURYR_ETHERTYPES=()
        if [[ "$KURYR_IPV6" == "False" ]]; then
            export KURYR_ETHERTYPE=IPv4
            KURYR_ETHERTYPES+=("IPv4")
            KURYR_SUBNETPOOLS_IDS+=(${_sp_id:-${SUBNETPOOL_V4_ID}})
        else
            KURYR_ETHERTYPES+=("IPv6")
            KURYR_SUBNETPOOLS_IDS+=($(openstack \
                --os-cloud devstack-admin \
                --os-region "${REGION_NAME}" \
                subnet pool show ${SUBNETPOOL_KURYR_NAME_V6} -c id -f value))
        fi
    fi

    for i in "${!KURYR_SERVICE_SUBNETS_IDS[@]}"; do
        pod_subnet_gw=$(openstack subnet show "${KURYR_POD_SUBNETS_IDS[$i]}" \
                        -c gateway_ip -f value)
        if is_service_enabled kuryr-kubernetes && [[ "$KURYR_SUBNET_DRIVER" == "namespace" ]]; then
            cidrs=$(openstack subnet pool show "${KURYR_SUBNETPOOLS_IDS[$i]}" -c prefixes -f value)
            subnetpool_cidr=$(python3 -c "print(${cidrs}[0])")
            sudo ip route add "$subnetpool_cidr" via "$pod_subnet_gw" dev "$ifname"
        else
            service_subnet_cidr=$(openstack --os-cloud devstack-admin \
                                 --os-region "$REGION_NAME" \
                                 subnet show "${KURYR_SERVICE_SUBNETS_IDS[$i]}" \
                                 -c cidr -f value)
            sudo ip route add "$service_subnet_cidr" via "$pod_subnet_gw" dev "$ifname"
        fi
    done

    if [ -n "$port_number" ]; then
        # if openstack-INPUT chain doesn't exist we create it in INPUT (for
        # local development envs since openstack-INPUT is usually only in gates)
        if [[ "$KURYR_IPV6" == "False" || "$KURYR_DUAL_STACK" == "True" ]]; then
            sudo iptables -I openstack-INPUT 1 \
                -p tcp -s 0.0.0.0/0 -d 0.0.0.0/0 --dport $port_number -j ACCEPT || \
            sudo iptables -I INPUT 1 \
                -p tcp -m conntrack --ctstate NEW \
                -m tcp --dport "$port_number" \
                -m comment --comment "kuryr-devstack: Access to OpenShift API" -j ACCEPT
        fi
        if [[ "$KURYR_IPV6" == "True" || "$KURYR_DUAL_STACK" == "True" ]]; then
            sudo ip6tables -I openstack-INPUT 1 \
                -p tcp -s ::/0 -d ::/0 --dport $port_number -j ACCEPT || \
            sudo ip6tables -I INPUT 1 \
                -p tcp -m conntrack --ctstate NEW \
                -m tcp --dport "$port_number" \
                -m comment --comment "kuryr-devstack: Access to OpenShift API" -j ACCEPT
        fi
    fi
}

# _allocation_range
#   Description: Writes out tab separated usable ip range for a CIDR
#   Params:
#       cidr - The cidr to get the range for
#       gateway_position - Whether to reserve at 'beginning' or at 'end'
function _allocation_range {
  python3 - <<EOF "$@"
import sys

from netaddr import IPNetwork


n = IPNetwork(str(sys.argv[1]))
gateway_position = sys.argv[2]

if gateway_position == 'beginning':
    beg_offset = 2
    end_offset = 2
elif gateway_position == 'end':
    beg_offset = 1
    end_offset = 3
else:
    raise ValueError('Disallowed gateway position %s' % gateway_position)

print("%s\\t%s" % (n[beg_offset], n[-end_offset]))
EOF
}

# create_k8s_icmp_sg_rules
#   Description: Creates icmp sg rules for Kuryr-Kubernetes pods
#   Params:
#      sg_id       - Kuryr's security group id
#      direction   - egress or ingress direction
function create_k8s_icmp_sg_rules {
    local sg_id=$1
    local direction="$2"
    local project_id

    project_id=$(get_or_create_project \
        "$KURYR_NEUTRON_DEFAULT_PROJECT" default)
    for ethertype in "${KURYR_ETHERTYPES[@]}"; do
        icmp_sg_rules=$(openstack --os-cloud devstack-admin \
                                  --os-region "$REGION_NAME" \
                                  security group rule create \
                                  --project "$project_id" \
                                  --protocol icmp \
                                  --ethertype "$ethertype" \
                                  --"$direction" "$sg_id")
    done
    die_if_not_set $LINENO icmp_sg_rules \
        "Failure creating icmp sg ${direction} rule for ${sg_id}"
}

# create_k8s_subnet
#   Description: Creates a network and subnet for Kuryr-Kubernetes usage
#   Params:
#      project_id       - Kuryr's project uuid
#      net_id           - ID of the network where to create subnet in
#      subnet_name      - Name of the subnet to create
#      subnetpool_id    - uuid of the subnet pool to use
#      router           - name of the router to plug the subnet to
#      split_allocation - Whether to allocate on all the subnet or only the
#                         latter half
#      ip_version       - IPv4 or IPv6
function create_k8s_subnet {
    local project_id=$1
    local net_id="$2"
    local subnet_name="$3"
    local subnetpool_id="$4"
    local router="$5"
    local subnet_params="--project $project_id "
    local subnet_cidr
    local split_allocation

    split_allocation="${6:-False}"
    local ip_version="${7:-IPv4}"

    if [ "$ip_version" == "IPv4" ]; then
        subnet_params+="--ip-version 4 "
    else
        # NOTE(dulek): K8s API won't accept subnets bigger than 20 bits.
        #              And 20 will totally be fine for us.
        subnet_params+="--ip-version 6 --prefix-length 108 "
    fi
    subnet_params+="--no-dhcp --gateway none "
    subnet_params+="--subnet-pool $subnetpool_id "
    subnet_params+="--network $net_id $subnet_name"

    local subnet_id
    subnet_id=$(openstack --os-cloud devstack-admin \
                          --os-region "$REGION_NAME" \
                          subnet create $subnet_params \
                          --project "$project_id" \
                          -c id -f value)
    die_if_not_set $LINENO subnet_id \
        "Failure creating K8s ${subnet_name} IPv4 subnet for ${project_id}"

    subnet_cidr=$(openstack --os-cloud devstack-admin \
                             --os-region "$REGION_NAME" \
                             subnet show "$subnet_id" \
                             -c cidr -f value)
    die_if_not_set $LINENO subnet_cidr \
        "Failure getting K8s ${subnet_name} IPv4 subnet for $project_id"

    # Since K8s has its own IPAM for services and allocates the first IP from
    # service subnet CIDR to Kubernetes apiserver, we'll always put the router
    # interface at the end of the range.
    local router_ip
    local allocation_start
    local allocation_end
    local allocation_subnet
    router_ip=$(_cidr_range "$subnet_cidr" | cut -f3)
    if [[ "$split_allocation" == "True" ]]; then
        allocation_subnet=$(split_subnet "$subnet_cidr" | cut -f2)
        allocation_start=$(_allocation_range "$allocation_subnet" end | cut -f1)
        allocation_end=$(_allocation_range "$allocation_subnet" end | cut -f2)
    else
        allocation_start=$(_allocation_range "$subnet_cidr" end | cut -f1)
        allocation_end=$(_allocation_range "$subnet_cidr" end | cut -f2)
    fi
    die_if_not_set $LINENO router_ip \
        "Failed to determine K8s ${subnet_name} subnet router IP"
    openstack --os-cloud devstack-admin \
        --os-region "$REGION_NAME" subnet set \
        --gateway "$router_ip" --no-allocation-pool "$subnet_id" \
        || die $LINENO "Failed to update K8s ${subnet_name} subnet"
    # Set a new allocation pool for the subnet so ports can be created again
    openstack --os-cloud devstack-admin \
        --os-region "$REGION_NAME" subnet set \
        --allocation-pool "start=${allocation_start},end=${allocation_end}" \
        "$subnet_id" || die $LINENO "Failed to update K8s ${subnet_name} subnet"
    openstack --os-cloud devstack-admin \
              --os-region "$REGION_NAME" \
              router add subnet "$router" "$subnet_id" \
              || die $LINENO \
              "Failed to enable routing for K8s ${subnet_name} subnet"
    echo "$subnet_id"
}

# build_kuryr_container_image
#   Description: Generates a Kuryr controller or Kuryr CNI docker image in
#       the local docker registry as kuryr/controller:latest for controller or
#       kuryr/cni:latest for CNI.
function build_kuryr_container_image {
    local target=$1  # controller or cni
    local build_args
    local build_dir

    build_dir="${DEST}/kuryr-kubernetes"
    pushd "$build_dir"

    if [[ "$KURYR_USE_LC" == "True" ]]; then
        build_args="--build-arg UPPER_CONSTRAINTS_FILE="`
            `"/opt/kuryr-kubernetes/lower-constraints.txt"
    fi

    # Build images
    # FIXME(dulek): Until https://github.com/containers/buildah/issues/1206 is
    #               resolved instead of podman we need to use buildah directly,
    #               hence this awful if clause.
    if [[ ${CONTAINER_ENGINE} == 'crio' ]]; then
        sudo buildah bud -t "docker.io/kuryr/${target}" \
            -f "${target}.Dockerfile" .
    else
        container_runtime build -t "kuryr/${target}" \
            -f "${target}.Dockerfile" ${build_args} .
    fi
    popd
}

function indent {
    sed 's/^/    /';
}

function generate_kuryr_configmap {
    local output_dir
    local conf_path
    output_dir=$1
    conf_path=${2:-""}

    mkdir -p "$output_dir"
    rm -f "${output_dir}/config_map.yml"

    cat >> "${output_dir}/config_map.yml" << EOF
apiVersion: v1
kind: ConfigMap
metadata:
  name: kuryr-config
  namespace: kube-system
data:
  kuryr.conf: |
EOF

    indent < "${conf_path}" >> "${output_dir}/config_map.yml"
}

function generate_kuryr_certificates_secret {
    local output_dir
    local certs_bundle_path
    output_dir=$1
    certs_bundle_path=${2:-""}

    mkdir -p "$output_dir"
    rm -f "${output_dir}/certificates_secret.yml"

    CA_CERT=\"\"  # It's a "" string that will be inserted into yaml file.

    if [ "$certs_bundle_path" -a -f "$certs_bundle_path" ]; then
        CA_CERT=$(base64 -w0 < "$certs_bundle_path")
    fi

    cat >> "${output_dir}/certificates_secret.yml" << EOF
apiVersion: v1
kind: Secret
metadata:
  name: kuryr-certificates
  namespace: kube-system
type: Opaque
data:
  kuryr-ca-bundle.crt: $CA_CERT
EOF
}

# Generates kuryr-controller service account and kuryr-cni service account.
function generate_kuryr_service_account {
    output_dir=$1
    mkdir -p "$output_dir"
    rm -f "${output_dir}/controller_service_account.yml"
    rm -f "${output_dir}/cni_service_account.yml"
    cat >> "${output_dir}/controller_service_account.yml" << EOF
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: kuryr-controller
  namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: kuryr-controller
rules:
- apiGroups:
  - ""
  verbs: ["*"]
  resources:
    - endpoints
    - pods
    - nodes
    - services
    - services/status
    - namespaces
- apiGroups:
    - openstack.org
  verbs: ["*"]
  resources:
    - kuryrnets
    - kuryrnetworks
    - kuryrnetpolicies
    - kuryrnetworkpolicies
    - kuryrloadbalancers
    - kuryrports
- apiGroups: ["networking.k8s.io"]
  resources:
  - networkpolicies
  verbs:
  - get
  - list
  - watch
  - update
  - patch
- apiGroups: ["k8s.cni.cncf.io"]
  resources:
  - network-attachment-definitions
  verbs:
  - get
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: kuryr-controller-global
subjects:
- kind: ServiceAccount
  name: kuryr-controller
  namespace: kube-system
roleRef:
  kind: ClusterRole
  name: kuryr-controller
  apiGroup: rbac.authorization.k8s.io
EOF

    cat >> "${output_dir}/cni_service_account.yml" << EOF
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: kuryr-cni
  namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: kuryr-cni
rules:
- apiGroups:
  - ""
  verbs: ["*"]
  resources:
    - pods
    - nodes
- apiGroups:
    - openstack.org
  verbs: ["*"]
  resources:
    - kuryrports
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: kuryr-cni-global
subjects:
- kind: ServiceAccount
  name: kuryr-cni
  namespace: kube-system
roleRef:
  kind: ClusterRole
  name: kuryr-cni
  apiGroup: rbac.authorization.k8s.io
EOF
}

function generate_controller_deployment {
    output_dir=$1
    health_server_port=$2
    controller_ha=$3
    mkdir -p "$output_dir"
    rm -f "${output_dir}/controller_deployment.yml"
    cat >> "${output_dir}/controller_deployment.yml" << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    name: kuryr-controller
  name: kuryr-controller
  namespace: kube-system
spec:
  replicas: ${KURYR_CONTROLLER_REPLICAS:-1}
  selector:
    matchLabels:
      name: kuryr-controller
EOF

    # When running without HA we should make sure that we won't have more than
    # one kuryr-controller pod in the deployment.
    if [ "$controller_ha" == "False" ]; then
        cat >> "${output_dir}/controller_deployment.yml" << EOF
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 0
      maxUnavailable: 1
EOF
    fi

    cat >> "${output_dir}/controller_deployment.yml" << EOF
  template:
    metadata:
      labels:
        name: kuryr-controller
      name: kuryr-controller
    spec:
      serviceAccountName: kuryr-controller
      automountServiceAccountToken: true
      hostNetwork: true
      containers:
EOF

    if [ "$controller_ha" == "True" ]; then
        cat >> "${output_dir}/controller_deployment.yml" << EOF
      - image: gcr.io/google_containers/leader-elector:0.5
        name: leader-elector
        args:
        - "--election=kuryr-controller"
        - "--http=0.0.0.0:${KURYR_CONTROLLER_HA_PORT:-16401}"
        - "--election-namespace=kube-system"
        - "--ttl=5s"
        ports:
        - containerPort: ${KURYR_CONTROLLER_HA_PORT:-16401}
          protocol: TCP
EOF
    fi

    cat >> "${output_dir}/controller_deployment.yml" << EOF
      - image: kuryr/controller:latest
        imagePullPolicy: Never
        name: controller
        terminationMessagePath: "/dev/termination-log"
        volumeMounts:
        - name: config-volume
          mountPath: "/etc/kuryr"
        - name: certificates-volume
          mountPath: "/etc/ssl/certs"
          readOnly: true
        readinessProbe:
          httpGet:
            path: /ready
            port: ${health_server_port}
            scheme: HTTP
          timeoutSeconds: 5
        livenessProbe:
          httpGet:
            path: /alive
            port: ${health_server_port}
          initialDelaySeconds: 15
EOF

    cat >> "${output_dir}/controller_deployment.yml" << EOF
      volumes:
      - name: config-volume
        configMap:
          name: kuryr-config
      - name: certificates-volume
        secret:
          secretName: kuryr-certificates
      restartPolicy: Always
      tolerations:
      - key: "node-role.kubernetes.io/master"
        operator: "Exists"
        effect: "NoSchedule"
      - key: "node.kubernetes.io/not-ready"
        operator: "Exists"
        effect: "NoSchedule"
EOF
}

function generate_cni_daemon_set {
    output_dir=$1
    cni_health_server_port=$2
    cni_bin_dir=${3:-/opt/cni/bin}
    cni_conf_dir=${4:-/etc/cni/net.d}
    mkdir -p "$output_dir"
    rm -f "${output_dir}/cni_ds.yml"
    cat >> "${output_dir}/cni_ds.yml" << EOF
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kuryr-cni-ds
  namespace: kube-system
  labels:
    tier: node
    app: kuryr-cni
spec:
  selector:
    matchLabels:
      app: kuryr-cni
  template:
    metadata:
      labels:
        tier: node
        app: kuryr-cni
    spec:
      hostNetwork: true
      tolerations:
      - key: node-role.kubernetes.io/master
        operator: Exists
        effect: NoSchedule
      - key: "node.kubernetes.io/not-ready"
        operator: "Exists"
        effect: "NoSchedule"
      serviceAccountName: kuryr-cni
      containers:
      - name: kuryr-cni
        image: kuryr/cni:latest
        imagePullPolicy: Never
        command: [ "cni_ds_init" ]
        env:
        - name: KUBERNETES_NODE_NAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        - name: KURYR_CNI_POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        securityContext:
          privileged: true
        volumeMounts:
        - name: bin
          mountPath: /opt/cni/bin
        - name: net-conf
          mountPath: /etc/cni/net.d
        - name: config-volume
          mountPath: /etc/kuryr
        - name: proc
          mountPath: /host_proc
        - name: var-pci
          mountPath: /var/pci_address
        - name: var-run
          mountPath: /var/run
          mountPropagation: HostToContainer
EOF
    cat >> "${output_dir}/cni_ds.yml" << EOF
        readinessProbe:
          httpGet:
            path: /ready
            port: ${cni_health_server_port}
            scheme: HTTP
          initialDelaySeconds: 60
          timeoutSeconds: 10
        livenessProbe:
          httpGet:
            path: /alive
            port: ${cni_health_server_port}
          initialDelaySeconds: 60
      volumes:
        - name: bin
          hostPath:
            path: ${cni_bin_dir}
        - name: net-conf
          hostPath:
            path: ${cni_conf_dir}
        - name: config-volume
          configMap:
            name: kuryr-config
        - name: proc
          hostPath:
            path: /proc
        - name: var-pci
          hostPath:
            path: /var/pci_address
EOF
    if [[ -n "$VAR_RUN_PATH" ]]; then
        cat >> "${output_dir}/cni_ds.yml" << EOF
        - name: var-run
          hostPath:
            path: ${VAR_RUN_PATH}
EOF
    else
        cat >> "${output_dir}/cni_ds.yml" << EOF
        - name: var-run
          hostPath:
            path: /var/run
EOF
    fi
}

# lb_state
#   Description: Returns the state of the load balancer
#   Params:
#      id - Id or name of the loadbalancer the state of which needs to be
#           retrieved.
function lb_state {
    local lb_id

    lb_id="$1"
    openstack loadbalancer show "$lb_id" | \
        awk '/provisioning_status/ {print $4}'
}

function _wait_for_lb {
    local lb_name
    local curr_time
    local time_diff
    local start_time

    lb_name="$1"
    timeout=${2:-$KURYR_WAIT_TIMEOUT}

    echo -n "Waiting for LB:$lb_name"
    start_time=$(date +%s)

    while [[ "$(lb_state "$lb_name")" != "ACTIVE" ]]; do
        echo -n "Waiting till LB=$lb_name is ACTIVE."
        curr_time=$(date +%s)
        time_diff=$((curr_time - start_time))
        [[ $time_diff -le $timeout ]] || die "Timed out waiting for $lb_name"
        sleep 5
    done
}

# create_load_balancer
#   Description: Creates an OpenStack Load Balancer with either neutron LBaaS
#                or Octavia
#   Params:
#       lb_name: Name to give to the load balancer.
#       lb_vip_subnet: Id or name of the subnet where lb_vip should be
#                      allocated.
#       project_id: Id of the project where the load balancer should be
#                   allocated.
#       lb_vip: Virtual IP to give to the load balancer - optional.
function create_load_balancer {
    local lb_name
    local lb_vip_subnet
    local lb_params
    local project_id

    lb_name="$1"
    lb_vip_subnet="$2"
    project_id="$3"

    lb_params=" --name $lb_name "
    if [ -z "$4" ]; then
        echo -n "create_load_balancer LB=$lb_name, lb_vip not provided."
    else
        lb_params+=" --vip-address $4"
    fi

    lb_params+=" --project ${project_id} --vip-subnet-id $lb_vip_subnet"
    openstack loadbalancer create $lb_params
}

# create_load_balancer_listener
#   Description: Creates an OpenStack Load Balancer Listener for the specified
#                Load Balancer with either neutron LBaaS or Octavia
#   Params:
#       name: Name to give to the load balancer listener.
#       protocol: Whether it is HTTP, HTTPS, TCP, etc.
#       port: The TCP port number to listen to.
#       data_timeouts: Octavia's timeouts for client and server inactivity.
#       lb: Id or name of the Load Balancer we want to add the Listener to.
#       project_id: Id of the project where this listener belongs to.
function create_load_balancer_listener {
    local name
    local protocol
    local port
    local lb
    local data_timeouts
    local max_timeout
    local project_id

    name="$1"
    protocol="$2"
    port="$3"
    lb="$4"
    project_id="$5"
    data_timeouts="$6"

    max_timeout=1200
    # Octavia needs the LB to be active for the listener
    _wait_for_lb "$lb" "$max_timeout"

    openstack loadbalancer listener create --name "$name" \
        --protocol "$protocol" \
        --protocol-port "$port" \
        --timeout-client-data "$data_timeouts" \
        --timeout-member-data "$data_timeouts" \
        "$lb"
}

# create_load_balancer_pool
#   Description: Creates an OpenStack Load Balancer Pool for the specified
#                Load Balancer listener with either neutron LBaaS or Octavia
#   Params:
#       name: Name to give to the load balancer listener.
#       protocol: Whether it is HTTP, HTTPS, TCP, etc.
#       algorithm: Load Balancing algorithm to use.
#       listener: Id or name of the Load Balancer Listener we want to add the
#                 pool to.
#       project_id: Id of the project where this pool belongs to.
#       lb: Id or name of the Load Balancer we want to add the pool to
#           (optional).
function create_load_balancer_pool {
    local name
    local protocol
    local algorithm
    local listener
    local lb
    local project_id

    name="$1"
    protocol="$2"
    algorithm="$3"
    listener="$4"
    project_id="$5"
    lb="$6"

    # We must wait for the LB to be active before we can put a Pool for it
    _wait_for_lb "$lb"

    openstack loadbalancer pool create --name "$name" \
        --listener "$listener" \
        --protocol "$protocol" \
        --lb-algorithm "$algorithm"
}

# create_load_balancer_member
#   Description: Creates an OpenStack load balancer pool member
#   Params:
#       name: Name to give to the load balancer pool member.
#       address: Whether it is HTTP, HTTPS, TCP, etc.
#       port: Port number the pool member is listening on.
#       pool: Id or name of the Load Balancer pool this member belongs to.
#       subnet: Id or name of the subnet the member address belongs to.
#       lb: Id or name of the load balancer the member belongs to.
#       project_id: Id of the project where this pool belongs to.
function create_load_balancer_member {
    local name
    local address
    local port
    local pool
    local lb
    local project_id

    name="$1"
    address="$2"
    port="$3"
    pool="$4"
    lb="$5"
    project_id="$6"

    # We must wait for the pool creation update before we can add members
    _wait_for_lb "$lb"

    openstack loadbalancer member create --name "$name" \
        --address "$address" \
        --protocol-port "$port" \
        "$pool"
}

# split_subnet
#   Description: Splits a subnet in two subnets that constitute its halves
#   Params:
#       cidr: Subnet CIDR to split
#   Returns: tab separated CIDRs of the two halves.
function split_subnet {
    # precondition: The passed cidr must be of a prefix <= 30
    python3 - <<EOF "$@"
import sys

from netaddr import IPNetwork


n = IPNetwork(str(sys.argv[1]))
first, last = n.subnet(n.prefixlen+1)

print("%s\\t%s" % (first, last))
EOF
}

# cleanup_kuryr_devstack_iptables
#    Description: Fins all the iptables rules we set and deletes them
function cleanup_kuryr_devstack_iptables {
    local chains

    chains=( INPUT FORWARD OUTPUT )
    for chain in "${chains[@]}"; do
        sudo iptables -n -L "$chain" -v --line-numbers | \
            awk -v chain="$chain" \
                '/kuryr-devstack/ {print "sudo iptables -D " chain " " $1}' | \
            tac | bash /dev/stdin
    done
}

function build_install_kuryr_cni {
    pushd "${KURYR_HOME}/kuryr_cni" || exit 1
    hack/build-go.sh
    sudo install -o "$STACK_USER" -m 0555 -D bin/kuryr-cni \
        "${CNI_BIN_DIR}/kuryr-cni"
    popd
}

function create_kuryr_account {
    create_service_user "kuryr" "admin"
    get_or_create_service "kuryr-kubernetes" "kuryr-kubernetes" \
        "Kuryr-Kubernetes Service"
}


function _create_kuryr_cache_dir {
    # Create cache directory
    sudo install -d -o "$STACK_USER" "$KURYR_AUTH_CACHE_DIR"
    if [[ ! "$KURYR_AUTH_CACHE_DIR" == "" ]]; then
        rm -f "$KURYR_AUTH_CACHE_DIR"/*
    fi
}

function _create_kuryr_lock_dir {
    # Create lock directory
    sudo install -d -o "$STACK_USER" "$KURYR_LOCK_DIR"
}

function configure_kuryr {
    local dir
    sudo install -d -o "$STACK_USER" "$KURYR_CONFIG_DIR"
    "${KURYR_HOME}/tools/generate_config_file_samples.sh"
    sudo install -o "$STACK_USER" -m 640 -D \
        "${KURYR_HOME}/etc/kuryr.conf.sample" "$KURYR_CONFIG"

    iniset "$KURYR_CONFIG" kubernetes ssl_client_crt_file "$KURYR_K8S_API_CERT"
    iniset "$KURYR_CONFIG" kubernetes ssl_client_key_file "$KURYR_K8S_API_KEY"
    if [ "$KURYR_K8S_API_CACERT" ]; then
        iniset "$KURYR_CONFIG" kubernetes ssl_ca_crt_file "$KURYR_K8S_API_CACERT"
        iniset "$KURYR_CONFIG" kubernetes ssl_verify_server_crt True
    fi
    if [ "$KURYR_MULTI_VIF_DRIVER" ]; then
        iniset "$KURYR_CONFIG" kubernetes multi_vif_drivers "$KURYR_MULTI_VIF_DRIVER"
    fi
    # REVISIT(ivc): 'use_stderr' is required for current CNI driver. Once a
    # daemon-based CNI driver is implemented, this could be removed.
    iniset "$KURYR_CONFIG" DEFAULT use_stderr true

    iniset "$KURYR_CONFIG" DEFAULT debug "$ENABLE_DEBUG_LOG_LEVEL"

    iniset "$KURYR_CONFIG" kubernetes port_debug "$KURYR_PORT_DEBUG"

    iniset "$KURYR_CONFIG" kubernetes pod_subnets_driver "$KURYR_SUBNET_DRIVER"
    iniset "$KURYR_CONFIG" kubernetes pod_security_groups_driver "$KURYR_SG_DRIVER"
    iniset "$KURYR_CONFIG" kubernetes service_security_groups_driver "$KURYR_SG_DRIVER"
    iniset "$KURYR_CONFIG" kubernetes enabled_handlers "$KURYR_ENABLED_HANDLERS"

    # Let Kuryr retry connections to K8s API for 20 minutes.
    iniset "$KURYR_CONFIG" kubernetes watch_retry_timeout 1200

    if [ "${KURYR_CONT}" == "True" ]; then
        # This works around the issue of being unable to set oslo.privsep mode
        # to FORK in os-vif. When running in a container we disable `sudo` that
        # was prefixed before `privsep-helper` command. This let's us run in
        # envs without sudo and keep the same python environment as the parent
        # process.
        iniset "$KURYR_CONFIG" vif_plug_ovs_privileged helper_command privsep-helper
        iniset "$KURYR_CONFIG" vif_plug_linux_bridge_privileged helper_command privsep-helper

        # When running kuryr-daemon or CNI in container we need to set up
        # some configs.
        iniset "$KURYR_CONFIG" cni_daemon docker_mode True
        iniset "$KURYR_CONFIG" cni_daemon netns_proc_dir "/host_proc"
    else
        iniset "$KURYR_CONFIG" oslo_concurrency lock_path "$KURYR_LOCK_DIR"
        _create_kuryr_lock_dir
        iniset "$KURYR_CONFIG" cni_health_server cg_path \
            "/system.slice/system-devstack.slice/devstack@kuryr-daemon.service"
    fi

    _create_kuryr_cache_dir

    # Neutron API server & Neutron plugin
    if is_service_enabled kuryr-kubernetes; then
        configure_auth_token_middleware "$KURYR_CONFIG" kuryr \
        "$KURYR_AUTH_CACHE_DIR" neutron
        iniset "$KURYR_CONFIG" kubernetes pod_vif_driver "$KURYR_POD_VIF_DRIVER"
        if [ "$KURYR_USE_PORTS_POOLS" ]; then
            iniset "$KURYR_CONFIG" kubernetes vif_pool_driver "$KURYR_VIF_POOL_DRIVER"
            iniset "$KURYR_CONFIG" vif_pool ports_pool_min "$KURYR_VIF_POOL_MIN"
            iniset "$KURYR_CONFIG" vif_pool ports_pool_max "$KURYR_VIF_POOL_MAX"
            iniset "$KURYR_CONFIG" vif_pool ports_pool_batch "$KURYR_VIF_POOL_BATCH"
            iniset "$KURYR_CONFIG" vif_pool ports_pool_update_frequency "$KURYR_VIF_POOL_UPDATE_FREQ"
            if [ "$KURYR_VIF_POOL_MANAGER" ]; then
                iniset "$KURYR_CONFIG" kubernetes enable_manager "$KURYR_VIF_POOL_MANAGER"

                dir=`iniget "$KURYR_CONFIG" vif_pool manager_sock_file`
                if [[ -z $dir ]]; then
                    dir="/run/kuryr/kuryr_manage.sock"
                fi
                dir=`dirname $dir`
                sudo mkdir -p $dir
            fi
        fi
    fi
}

function copy_kuryr_certs {
    # copy kubelet key and make ubuntu user owner of it
    sudo cp /etc/kubernetes/pki/apiserver-kubelet-client.key \
        /etc/kubernetes/pki/kuryr-client.key
    sudo chown $(whoami) /etc/kubernetes/pki/kuryr-client.key
}

function _generate_containerized_kuryr_resources {
    if [[ $KURYR_CONTROLLER_REPLICAS -eq 1 ]]; then
        KURYR_CONTROLLER_HA="False"
    else
        KURYR_CONTROLLER_HA="True"
    fi

    # Containerized deployment will use tokens provided by k8s itself.
    inicomment "$KURYR_CONFIG" kubernetes ssl_client_crt_file
    inicomment "$KURYR_CONFIG" kubernetes ssl_client_key_file

    iniset "$KURYR_CONFIG" kubernetes controller_ha ${KURYR_CONTROLLER_HA}
    iniset "$KURYR_CONFIG" kubernetes controller_ha_port ${KURYR_CONTROLLER_HA_PORT}

    # NOTE(dulek): In the container the CA bundle will be mounted in a standard
    # directory
    iniset "$KURYR_CONFIG" neutron cafile /etc/ssl/certs/kuryr-ca-bundle.crt

    # Generate kuryr resources in k8s formats.
    local output_dir="${DATA_DIR}/kuryr-kubernetes"
    generate_kuryr_configmap $output_dir $KURYR_CONFIG
    generate_kuryr_certificates_secret $output_dir $SSL_BUNDLE_FILE
    generate_kuryr_service_account $output_dir
    generate_controller_deployment $output_dir $KURYR_HEALTH_SERVER_PORT $KURYR_CONTROLLER_HA
    generate_cni_daemon_set $output_dir $KURYR_CNI_HEALTH_SERVER_PORT $CNI_BIN_DIR $CNI_CONF_DIR
}

function run_containerized_kuryr_resources {
    local k8s_data_dir="${DATA_DIR}/kuryr-kubernetes"
    kubectl create -f \
        "${k8s_data_dir}/config_map.yml" \
        || die $LINENO "Failed to create kuryr-kubernetes ConfigMap."
    kubectl create -f \
        "${k8s_data_dir}/certificates_secret.yml" \
        || die $LINENO "Failed to create kuryr-kubernetes certificates Secret."
    kubectl create -f \
        "${k8s_data_dir}/controller_service_account.yml" \
        || die $LINENO "Failed to create kuryr-controller ServiceAccount."
    kubectl create -f \
        "${k8s_data_dir}/cni_service_account.yml" \
        || die $LINENO "Failed to create kuryr-cni ServiceAccount."
    kubectl create -f \
        "${k8s_data_dir}/controller_deployment.yml" \
        || die $LINENO "Failed to create kuryr-kubernetes Deployment."
    kubectl create -f \
        "${k8s_data_dir}/cni_ds.yml" \
        || die $LINENO "Failed to create kuryr-kubernetes CNI DaemonSet."
}

function _cidr_range {
  python3 - <<EOF "$1"
import sys
from netaddr import IPAddress, IPNetwork
n = IPNetwork(sys.argv[1])
print("%s\\t%s\\t%s" % (IPAddress(n.first + 1), IPAddress(n.first + 2), IPAddress(n.last - 1)))
EOF
}

function copy_tempest_kubeconfig {
    local tempest_home
    tempest_home='/home/tempest'
    if [ -d "$tempest_home" ]; then
        sudo cp -r "${HOME}/.kube" "$tempest_home"
        sudo chown -R tempest "${tempest_home}/.kube"
    fi
}

function create_lb_for_services {
    # This allows pods that need access to kubernetes API (like the
    # containerized kuryr controller or kube-dns) to talk to the K8s API
    # service
    local api_port=6443
    local service_cidr
    local kubelet_iface_ip
    local lb_name
    local use_octavia
    local project_id
    local fixed_ips
    local address

    project_id=$(get_or_create_project \
        "$KURYR_NEUTRON_DEFAULT_PROJECT" default)
    lb_name='default/kubernetes'
    # TODO(dulek): We only look at the first service subnet because kubernetes
    #              API service is only IPv4 in 1.20. It might be dual stack
    #              in the future.
    service_cidr=$(openstack --os-cloud devstack-admin \
                             --os-region "$REGION_NAME" \
                             subnet show "${KURYR_SERVICE_SUBNETS_IDS[0]}" \
                             -c cidr -f value)

    fixed_ips=$(openstack port show kubelet-"${HOSTNAME}" -c fixed_ips -f value)
    kubelet_iface_ip=$(python3 -c "print(${fixed_ips}[0]['ip_address'])")

    k8s_api_clusterip=$(_cidr_range "$service_cidr" | cut -f1)

    echo "***********************************************************************"
    echo "lbname: $lb_name subnet ${KURYR_SERVICE_SUBNETS_IDS[0]} pid: $project_id api-cluster: $k8s_api_clusteri"
    echo "***********************************************************************"
    create_load_balancer "$lb_name" "${KURYR_SERVICE_SUBNETS_IDS[0]}" \
            "$project_id" "$k8s_api_clusterip"
    create_load_balancer_listener default/kubernetes:${KURYR_K8S_API_LB_PORT} HTTPS ${KURYR_K8S_API_LB_PORT} "$lb_name" "$project_id" 3600000
    create_load_balancer_pool default/kubernetes:${KURYR_K8S_API_LB_PORT} HTTPS ROUND_ROBIN \
        default/kubernetes:${KURYR_K8S_API_LB_PORT} "$project_id" "$lb_name"

    if [[ "${KURYR_OVS_BM}" == "True" ]]; then
        address=${kubelet_iface_ip}
    else
        address="${HOST_IP}"
    fi

    # Regardless of the octavia mode, the k8s API will be behind an L3 mode
    # amphora driver loadbalancer
    create_load_balancer_member "$(hostname)" "$address" "$api_port" \
        default/kubernetes:${KURYR_K8S_API_LB_PORT} "$lb_name" "$project_id"
}

function _configure_neutron_defaults {
    local project_id
    local sg_ids
    local router
    local router_id
    local ext_svc_net_id
    local addrs_prefix
    local subnetpool_name

    project_id=$(get_or_create_project \
        "$KURYR_NEUTRON_DEFAULT_PROJECT" default)
    ext_svc_net_id="$(openstack network show -c id -f value \
        "${KURYR_NEUTRON_DEFAULT_EXT_SVC_NET}")"

    # If a subnetpool is not passed, we get the one created in devstack's
    # Neutron module

    export KURYR_SUBNETPOOLS_IDS=()
    export KURYR_ETHERTYPES=()
    if [[ "$KURYR_IPV6" == "False" || "$KURYR_DUAL_STACK" == "True" ]]; then
        export KURYR_ETHERTYPE=IPv4
        KURYR_ETHERTYPES+=("IPv4")
        KURYR_SUBNETPOOLS_IDS+=(${KURYR_NEUTRON_DEFAULT_SUBNETPOOL_ID:-${SUBNETPOOL_V4_ID}})
    fi
    if [[ "$KURYR_IPV6" == "True" || "$KURYR_DUAL_STACK" == "True" ]]; then
        export KURYR_ETHERTYPE=IPv6
        KURYR_ETHERTYPES+=("IPv6")
        # NOTE(gryf): To not clash with subnets created by DevStack for IPv6,
        # we create another subnetpool just for kuryr subnets.
        # SUBNETPOOL_KURYR_V6_ID will be used in function configure_kuryr in
        # case of namespace kuryr subnet driver.
        # This is not required for IPv4, because DevStack is only adding a
        # conflicting route for IPv6. On DevStack this route is opening public
        # IPv6 network to be accessible from host, which doesn't have place in
        # IPv4 net, because floating IPs are used instead.
        IPV6_ID=$(uuidgen | sed s/-//g | cut -c 23- | \
            sed -e "s/\(..\)\(....\)\(....\)/\1:\2:\3/")
        addrs_prefix="fd${IPV6_ID}::/56"
        subnetpool_name=${SUBNETPOOL_KURYR_NAME_V6}
        KURYR_SUBNETPOOLS_IDS+=($(openstack \
            --os-cloud devstack-admin \
            --os-region "${REGION_NAME}" \
            subnet pool create "${subnetpool_name}" \
            --default-prefix-length "${SUBNETPOOL_SIZE_V6}" \
            --pool-prefix "${addrs_prefix}" \
            --share -f value -c id))
    fi

    router=${KURYR_NEUTRON_DEFAULT_ROUTER:-$Q_ROUTER_NAME}
    if [ "$router" != "$Q_ROUTER_NAME" ]; then
        openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
            router create --project "$project_id" "$router"
        openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
            router set --external-gateway "$ext_svc_net_id" "$router"
    fi
    router_id="$(openstack router show -c id -f value "$router")"

    pod_net_id=$(openstack --os-cloud devstack-admin \
                       --os-region "$REGION_NAME" \
                       network create --project "$project_id" \
                       "$KURYR_NEUTRON_DEFAULT_POD_NET" \
                       -c id -f value)
    service_net_id=$(openstack --os-cloud devstack-admin \
                       --os-region "$REGION_NAME" \
                       network create --project "$project_id" \
                       "$KURYR_NEUTRON_DEFAULT_SERVICE_NET" \
                       -c id -f value)

    export KURYR_POD_SUBNETS_IDS=()
    export KURYR_SERVICE_SUBNETS_IDS=()
    for i in "${!KURYR_SUBNETPOOLS_IDS[@]}"; do
        KURYR_POD_SUBNETS_IDS+=($(create_k8s_subnet "$project_id" \
                          "$pod_net_id" \
                          "${KURYR_NEUTRON_DEFAULT_POD_SUBNET}-${KURYR_ETHERTYPES[$i]}" \
                          "${KURYR_SUBNETPOOLS_IDS[$i]}" \
                          "$router" "False" ${KURYR_ETHERTYPES[$i]}))

        KURYR_SERVICE_SUBNETS_IDS+=($(create_k8s_subnet "$project_id" \
                          "$service_net_id" \
                          "${KURYR_NEUTRON_DEFAULT_SERVICE_SUBNET}-${KURYR_ETHERTYPES[$i]}" \
                          "${KURYR_SUBNETPOOLS_IDS[$i]}" \
                          "$router" "True" ${KURYR_ETHERTYPES[$i]}))
    done

    sg_ids=()
    if [[ "$KURYR_SG_DRIVER" == "default" ]]; then
        sg_ids+=($(echo $(openstack security group list \
            --project "$project_id" -c ID -f value) | tr ' ' ','))
    fi

    # In order for the ports to allow service traffic under Octavia L3 mode,
    # it is necessary for the service subnet to be allowed into the port's
    # security groups. If L3 is used, then the pods created will include it.
    # Otherwise it will be just used by the kubelet port used for the K8s API
    # load balancer
    local service_pod_access_sg_id
    service_pod_access_sg_id=$(openstack --os-cloud devstack-admin \
        --os-region "$REGION_NAME" \
        security group create --project "$project_id" \
        service_pod_access -f value -c id)

    for i in "${!KURYR_SERVICE_SUBNETS_IDS[@]}"; do
        local service_cidr
        service_cidr=$(openstack --os-cloud devstack-admin \
            --os-region "$REGION_NAME" subnet show \
            "${KURYR_SERVICE_SUBNETS_IDS[$i]}" -f value -c cidr)
        openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
            security group rule create --project "$project_id" \
            --description "k8s service subnet allowed" \
            --remote-ip "$service_cidr" --ethertype "${KURYR_ETHERTYPES[$i]}" --protocol tcp \
            "$service_pod_access_sg_id"
        # Since Octavia supports also UDP load balancing, we need to allow
        # also udp traffic
        openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
            security group rule create --project "$project_id" \
            --description "k8s service subnet UDP allowed" \
            --remote-ip "$service_cidr" --ethertype "${KURYR_ETHERTYPES[$i]}" --protocol udp \
            "$service_pod_access_sg_id"
        # Octavia supports SCTP load balancing, we need to also allow SCTP traffic
        openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
            security group rule create --project "$project_id" \
            --description "k8s service subnet SCTP allowed" \
            --remote-ip "$service_cidr" --ethertype "${KURYR_ETHERTYPES[$i]}" --protocol sctp \
            "$service_pod_access_sg_id"
    done

    if [[ "$KURYR_K8S_OCTAVIA_MEMBER_MODE" == "L3" ]]; then
        sg_ids+=(${service_pod_access_sg_id})
    elif [[ "$KURYR_K8S_OCTAVIA_MEMBER_MODE" == "L2" ]]; then
        # In case the member connectivity is L2, Octavia by default uses the
        # admin 'default' sg to create a port for the amphora load balancer
        # at the member ports subnet. Thus we need to allow L2 communication
        # between the member ports and the octavia ports by allowing all
        # access from the pod subnet range to the ports in that subnet, and
        # include it into $sg_ids
        local octavia_pod_access_sg_id
        octavia_pod_access_sg_id=$(openstack --os-cloud devstack-admin \
            --os-region "$REGION_NAME" \
            security group create --project "$project_id" \
            octavia_pod_access -f value -c id)
        for i in "${!KURYR_POD_SUBNETS_IDS[@]}"; do
            local pod_cidr
            pod_cidr=$(openstack --os-cloud devstack-admin \
                --os-region "$REGION_NAME" subnet show \
                "${KURYR_POD_SUBNETS_IDS[$i]}" -f value -c cidr)
            openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
                security group rule create --project "$project_id" \
                --description "k8s pod subnet allowed from k8s-pod-subnet" \
                --remote-ip "$pod_cidr" --ethertype "${KURYR_ETHERTYPES[$i]}" --protocol tcp \
                "$octavia_pod_access_sg_id"
            # Since Octavia supports also UDP load balancing, we need to allow
            # also udp traffic
            openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
                security group rule create --project "$project_id" \
                --description "k8s pod subnet allowed from k8s-pod-subnet" \
                --remote-ip "$pod_cidr" --ethertype "${KURYR_ETHERTYPES[$i]}" --protocol udp \
                "$octavia_pod_access_sg_id"
            # Octavia supports SCTP load balancing, we need to also support SCTP traffic
            openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
                security group rule create --project "$project_id" \
                --description "k8s pod subnet allowed from k8s-pod-subnet" \
                --remote-ip "$pod_cidr" --ethertype "${KURYR_ETHERTYPES[$i]}" --protocol sctp \
                "$octavia_pod_access_sg_id"
        done
        sg_ids+=(${octavia_pod_access_sg_id})
    fi

    iniset "$KURYR_CONFIG" neutron_defaults project "$project_id"
    iniset "$KURYR_CONFIG" neutron_defaults pod_subnet "${KURYR_POD_SUBNETS_IDS[0]}"
    iniset "$KURYR_CONFIG" neutron_defaults pod_subnets $(IFS=, ; echo "${KURYR_POD_SUBNETS_IDS[*]}")
    iniset "$KURYR_CONFIG" neutron_defaults service_subnet "${KURYR_SERVICE_SUBNETS_IDS[0]}"
    iniset "$KURYR_CONFIG" neutron_defaults service_subnets $(IFS=, ; echo "${KURYR_SERVICE_SUBNETS_IDS[*]}")
    if [ "$KURYR_SUBNET_DRIVER" == "namespace" ]; then
        iniset "$KURYR_CONFIG" namespace_subnet pod_subnet_pool "${KURYR_SUBNETPOOLS_IDS[0]}"
        iniset "$KURYR_CONFIG" namespace_subnet pod_subnet_pools $(IFS=, ; echo "${KURYR_SUBNETPOOLS_IDS[*]}")
        iniset "$KURYR_CONFIG" namespace_subnet pod_router "$router_id"
    fi
    if [[ "$KURYR_SG_DRIVER" == "policy" ]]; then
        # NOTE(dulek): Using the default DevStack's SG is not enough to match
        # the NP specification. We need to open ingress to everywhere, so we
        # create allow-all group.
        allow_all_sg_id=$(openstack --os-cloud devstack-admin \
            --os-region "$REGION_NAME" \
            security group create --project "$project_id" \
            allow-all -f value -c id)
        for ethertype in ${KURYR_ETHERTYPES[@]}; do
            openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
              security group rule create --project "$project_id" \
              --description "allow all ingress traffic" \
              --ethertype "$ethertype" --ingress --protocol any \
              "$allow_all_sg_id"
        done
        sg_ids+=(${allow_all_sg_id})
    fi
    iniset "$KURYR_CONFIG" neutron_defaults pod_security_groups $(IFS=, ; echo "${sg_ids[*]}")

    if [[ "$KURYR_SG_DRIVER" == "policy" ]]; then
        # NOTE(ltomasbo): As more security groups and rules are created, there
        # is a need to increase the quota for it
         openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
             quota set --secgroups 100 --secgroup-rules 300 "$project_id"
    fi

    # NOTE(dulek): DevStack's admin default for SG's and instances is 10, this
    #              is too little for our tests with Octavia configured to use
    #              amphora.
    openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
        quota set --secgroups 100 --secgroup-rules 300 --instances 100 admin

    if [ -n "$OVS_BRIDGE" ]; then
        iniset "$KURYR_CONFIG" neutron_defaults ovs_bridge "$OVS_BRIDGE"
    fi
    iniset "$KURYR_CONFIG" neutron_defaults external_svc_net "$ext_svc_net_id"
    iniset "$KURYR_CONFIG" octavia_defaults member_mode "$KURYR_K8S_OCTAVIA_MEMBER_MODE"
    iniset "$KURYR_CONFIG" octavia_defaults enforce_sg_rules "$KURYR_ENFORCE_SG_RULES"
    iniset "$KURYR_CONFIG" octavia_defaults lb_algorithm "$KURYR_LB_ALGORITHM"
    iniset "$KURYR_CONFIG" octavia_defaults timeout_client_data "$KURYR_TIMEOUT_CLIENT_DATA"
    iniset "$KURYR_CONFIG" octavia_defaults timeout_member_data "$KURYR_TIMEOUT_MEMBER_DATA"
    # Octavia takes a very long time to start the LB in the gate. We need
    # to tweak the timeout for the LB creation. Let's be generous and give
    # it up to 20 minutes.
    # FIXME(dulek): This might be removed when bug 1753653 is fixed and
    #               Kuryr restarts waiting for LB on timeouts.
    iniset "$KURYR_CONFIG" neutron_defaults lbaas_activation_timeout 1200
    iniset "$KURYR_CONFIG" kubernetes endpoints_driver_octavia_provider "$KURYR_EP_DRIVER_OCTAVIA_PROVIDER"
}

function configure_k8s_pod_sg_rules {
    local project_id
    local sg_id

    project_id=$(get_or_create_project \
        "$KURYR_NEUTRON_DEFAULT_PROJECT" default)
    sg_id=$(openstack --os-cloud devstack-admin \
                      --os-region "$REGION_NAME" \
                      security group list \
                      --project "$project_id" -c ID -c Name -f value | \
                      awk '{if ($2=="default") print $1}')
    create_k8s_icmp_sg_rules "$sg_id" ingress
}

function prepare_kubernetes_files {
    mkdir -p "${KURYR_KUBERNETES_DATA_DIR}"
    # Copy certs for Kuryr services to use
    sudo install -m 644 /etc/kubernetes/pki/apiserver.crt \
        "${KURYR_KUBERNETES_DATA_DIR}/kuryr.crt"
    sudo install -m 644 /etc/kubernetes/pki/apiserver.key \
        "${KURYR_KUBERNETES_DATA_DIR}/kuryr.key"
    sudo install -m 644 /etc/kubernetes/pki/ca.crt \
        "${KURYR_KUBERNETES_DATA_DIR}/kuryr-ca.crt"
}

function wait_for {
    local name
    local url
    local cacert_path
    local start_time
    local curr_time
    local time_diff

    name="$1"
    url="$2"
    cacert_path=${3:-}
    timeout=${4:-$KURYR_WAIT_TIMEOUT}

    echo -n "Waiting for $name to respond"

    extra_flags=${cacert_path:+"--cacert ${cacert_path}"}

    start_time=$(date +%s)
    until curl -o /dev/null -s "$extra_flags" "$url"; do
        echo -n "."
        curr_time=$(date +%s)
        time_diff=$((curr_time - start_time))
        [[ $time_diff -le $timeout ]] || die "Timed out waiting for $name"
        sleep 1
    done
    echo ""
}

function _wait_for_ok_health {
    local name
    local url
    local start_time
    local curr_time
    local time_diff
    local apiserver
    local token

    name="$1"
    timeout=${2:-$KURYR_WAIT_TIMEOUT}
    apiserver=$(get_k8s_apiserver)
    token=$(get_k8s_token)

    url="${apiserver}/healthz"
    extra_flags=("-s" "--insecure" "--header" "Authorization: Bearer $token")

    start_time=$(date +%s)
    echo -n "Waiting for ${name} to be healthy"
    until [[ "$(curl "${extra_flags[@]}" "$url")" == "ok" ]]; do
        echo -n "."
        curr_time=$(date +%s)
        time_diff=$((curr_time - start_time))
        [[ $time_diff -le $timeout ]] || die "Timed out waiting for $name"
        sleep 1
    done
    echo ""
}

function prepare_kubeconfig {
    kubectl config set-cluster devstack-cluster \
        --server="${KURYR_K8S_API_URL}" --certificate-authority
    kubectl config set-credentials stack
    kubectl config set-context devstack --cluster=devstack-cluster --user=stack
    kubectl config use-context devstack
}

function prepare_kubelet {
    local kubelet_plugin_dir="/etc/cni/net.d/"
    sudo install -o "$STACK_USER" -m 0664 -D \
        "${KURYR_HOME}${kubelet_plugin_dir}/10-kuryr.conflist" \
        "${CNI_CONF_DIR}/10-kuryr.conflist"
}

function run_kuryr_kubernetes {
    local controller_bin

    _wait_for_ok_health "kubernetes" 1200

    controller_bin=$(which kuryr-k8s-controller)
    run_process kuryr-kubernetes "$controller_bin --config-file $KURYR_CONFIG"
}

function configure_overcloud_vm_k8s_svc_sg {
    local dst_port
    local project_id
    local security_group

    if is_service_enabled octavia; then
        dst_port=${KURYR_K8S_API_LB_PORT}
    else
        dst_port=${KURYR_K8S_API_PORT}
    fi

    project_id=$(get_or_create_project \
        "$KURYR_NEUTRON_DEFAULT_PROJECT" default)
    security_group=$(openstack security group list \
        --project "$project_id" -c ID -c Name -f value | \
        awk '{if ($2=="default") print $1}')
    for ethertype in "${KURYR_ETHERTYPES[@]}"; do
        openstack --os-cloud devstack-admin --os-region "$REGION_NAME" \
            security group rule create --project "$project_id" \
            --dst-port "$dst_port" --ethertype "$ethertype" "$security_group"
    done
    openstack port set "$KURYR_OVERCLOUD_VM_PORT" --security-group service_pod_access
}

function run_kuryr_daemon {
    local daemon_bin
    daemon_bin=$(which kuryr-daemon)
    run_process kuryr-daemon \
        "$daemon_bin --config-file $KURYR_CONFIG" root root
}

function update_tempest_conf_file {
    if [[ "$KURYR_USE_PORT_POOLS" == "True" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes port_pool_enabled True
    fi
    if [[ "${KURYR_CONT}" == "True" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes containerized True
    fi
    if [[ "$KURYR_SUBNET_DRIVER" == "namespace" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes subnet_per_namespace True
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes kuryrnetworks True
    fi
    if [[ "$KURYR_K8S_SERIAL_TESTS" == "True" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes run_tests_serial True
    fi
    if [[ "$KURYR_MULTI_VIF_DRIVER" == "npwg_multiple_interfaces" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes npwg_multi_vif_enabled True
    fi
    if [[ "$KURYR_ENABLED_HANDLERS" =~ .*policy.* ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes network_policy_enabled True
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes new_kuryrnetworkpolicy_crd True
    fi
    # NOTE(yboaron): Services with protocol UDP are supported in Kuryr
    # starting from Stein release
    iniset "$TEMPEST_CONFIG" kuryr_kubernetes test_udp_services True
    if [[ "$KURYR_CONTROLLER_HA" == "True" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes ap_ha True
    fi
    if [[ "$KURYR_K8S_MULTI_WORKER_TESTS" == "True" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes multi_worker_setup True
    fi
    if [[ "$KURYR_K8S_CLOUD_PROVIDER" == "True" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes cloud_provider True
    fi
    if [[ "$KURYR_CONFIGMAP_MODIFIABLE" == "True" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes configmap_modifiable True
    fi
    if [[ "$KURYR_IPV6" == "True" || "$KURYR_DUAL_STACK" == "True" ]]; then
        iniset "$TEMPEST_CONFIG" kuryr_kubernetes ipv6 True
    fi
    iniset "$TEMPEST_CONFIG" kuryr_kubernetes enable_reconciliation True
    iniset "$TEMPEST_CONFIG" kuryr_kubernetes validate_crd True
    iniset "$TEMPEST_CONFIG" kuryr_kubernetes kuryrports True
    iniset "$TEMPEST_CONFIG" kuryr_kubernetes kuryrloadbalancers True
    iniset "$TEMPEST_CONFIG" kuryr_kubernetes test_services_without_selector True
    iniset "$TEMPEST_CONFIG" kuryr_kubernetes test_sctp_services True
    iniset "$TEMPEST_CONFIG" kuryr_kubernetes test_configurable_listener_timeouts True
}

function configure_neutron_defaults {
    local k8s_api_clusterip
    local service_cidr

    if [ "${KURYR_CONF_NEUTRON}" == "False" ]; then
        return
    fi

    if is_service_enabled kuryr-kubernetes; then
        _configure_neutron_defaults
    fi

    if [ "${KURYR_CONT}" == "False" ]; then
        KURYR_K8S_API_ROOT=${KURYR_K8S_API_URL}
        iniset "$KURYR_CONFIG" kubernetes api_root "${KURYR_K8S_API_ROOT}"
        iniset "$KURYR_CONFIG" kubernetes token_file '""'
    else
        iniset "$KURYR_CONFIG" kubernetes api_root '""'
    fi
}

function uninstall_kuryr_cni {
    sudo rm "${CNI_BIN_DIR}/kuryr-cni"
    if [ -z "$(ls -A ${CNI_BIN_DIR})" ]; then
        sudo rm -fr "${CNI_BIN_DIR}"
    fi
}

function rm_kuryr_conf {
    sudo rm -fr /etc/kuryr
}
